由极值的必要条件可得 2∑mE∑a9(x)-y,(x)=0 (qq)=(q9 ∑aA∑P(x柳(x=∑Py9(x),j=01…,n(33) k=0=1 i=1 用矩阵表示法方程为 (02q0)(021)…(029n) (y,0o) (q1,90)(2)…(q1,n) (y,91) (3.5) (n,9)(qn,9)…(qn,9n)人an)(yqn,)由极值的必要条件可得 = = = − = m i i j i n k i k k i j a x y x a I 1 0 2 [ ( ) ] ( ) 0 , j = 0,1, ,n = = = = m i j i i i j i n k k i m i k i a x x y x 0 1 1 [ ( ) ( )] ( ) , j = 0,1, ,n (3.3) 用矩阵表示法方程为 = ( , ) ( , ) ( , ) ( , ) ( , ) ( , ) ( , ) ( , ) ( , ) ( , ) ( , ) ( , ) 1 0 1 0 0 1 1 0 1 1 1 0 0 0 1 0 n n n n n n n n y y y a a a (3.5) (φ𝑖 , 𝜑𝑗)=(φ𝑗 , 𝜑𝑖)